.act_box{
    width: 100%;
    height: 100%;
    /* background-color: pink; */
}
.act_top{
    width: 100%;
    height: 10%;
    /* background-color: plum; */
    display: flex;
    align-items: center;
}
.act_nav{
    width: 50%;
    height: 100%;
    /* background-color: #fff; */
    margin-left: 10px;
}
.act_viod{
    width: 100%;
    height: 90%;
    /* background-color: palegoldenrod; */
    display: flex;
    justify-content: space-between;
}
.xiao_viod{
    width: 50%;
    height: 100%;
    /* background-color: pink; */
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}
.xiao_viod div{
    width: 46%;
    height: 49%;
    margin: 0 10px 5px 10px;
    /* background-color:palevioletred; */
}
/* .xiao_viod video{
    width: 100%;
    height: 100%;
} */
.da_viod{
    width: 49%;
    height: 100%;
    /* background-color: palegreen; */
}
.da_vid{
    width: 100%;
    height: 100%;
    /* background-color: pink; */
}
.da_vid video{
    width: 100%;
    height: 100%;
}
/* .da_vid :hover video{
    opacity: 1;
} */



   